Note

You are reading the documentation for an ESP-IDF release version that is end of life. The latest stable version is v5.4

Internal and Unstable APIs

This section is listing some APIs that are internal or likely to be changed or removed in the next releases of ESP-IDF.

API Reference

Functions

int esp_rom_printf(const char *fmt, ...)

Print formated string to console device.

Note

float and long long data are not supported!

Return

int: Total number of characters written on success; A negative number on failure.

Parameters

  • fmt: Format string

  • ...: Additional arguments, depending on the format string

void esp_rom_delay_us(uint32_t us)

Pauses execution for us microseconds.

Parameters

  • us: Number of microseconds to pause

void esp_rom_install_channel_putc(int channel, void (*putc)(char c))

esp_rom_printf can print message to different channels simultaneously. This function can help install the low level putc function for esp_rom_printf.

Parameters

  • channel: Channel number (startting from 1)

  • putc: Function pointer to the putc implementation. Set NULL can disconnect esp_rom_printf with putc.

void esp_rom_disable_logging(void)

Disable logging from the ROM code.

void esp_rom_install_uart_printf(void)

Install UART1 as the default console channel, equivalent to esp_rom_install_channel_putc(1, esp_rom_uart_putc)

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